On June 3, 2010 — A few days before he is expected to become the first overall selection in the 2010 amateur draft, Bryce Harper, playing for Southern Nevada, is ejected from a game in the National Junior College World Series in Grand Junction, CO for showing up an umpire and arguing balls and strikes. The ejection comes with an automatic two-game suspension, meaning Harper’s amateur career is over unless his team manages to reach the tournament final without its star hitter. While Harper’s playing talent has never been in doubt, there have been frequent questions about the make-up and maturity of the 17-year-old catcher.

Source
Baseball Reference June 3